A multi-layer plastic carrier tape

Abstract

The invention discloses a multi-layer plastic carrier band. The multi-layer plastic carrier band comprises an innermost middle core layer and two outermost surface layers, the multi-layer plastic carrier band is prepared by the following steps of (1) first time prilling: preparing plastic base material particles of each layer; (2) second time prilling: preparing plastic particles of each layer; (3) drying: drying the plastic particles of each layer; (4) co-extrusion: extruding a multi-layer sheet; (5) coating an anti-static liquid; (6) plastic molding; and (7) punching, slitting and rolling. The multi-layer plastic carrier band provided by the invention has the advantages that a multi-layer design is adopted, different layers can utilize plastic materials of different characteristics according to the required functions, the carrier band properties of which meet requirements is prepared, the technological process is simple, the equipment requirement is low, respective characteristics of different plastics are played furthest, the influence of an additive to the plastic characteristic is reduced, the middle core layer and an interlayer can be made of above reclaimed materials, the waste is reduced, and the pollution of environment from waste materials is also avoided.

Description

technical field [0001] The invention relates to a carrier tape molding process, in particular to a multilayer plastic carrier tape. Background technique [0002] The carrier tape used for packaging electronic components needs to have certain strength and toughness. With the precision and miniaturization of electronic components, the performance requirements for electronic packaging materials are more stringent, the difficulty requirements of the preparation process become higher and higher, and the production cost is also higher and higher. The performance of the original single-layer carrier tape cannot meet the requirements, or the cost is too high. The Chinese patent No. CN101992575 disclosed a polycarbonate coextruded multilayer sheet on March 30, 2011, which has a core layer as the innermost layer and two surface layers as the outermost layer. The core layer is formed of a polycarbonate resin composition containing 4 to 7% by mass of carbon black and 0.1 to 2.0% by ma...

AI Technical Summary

Problems solved by technology

However, the main raw materials of the core layer and the surface layer are polycarbonate resins. It is difficult for the same material to meet the functional needs of the product in various aspects, and it also increases the overall cost of the sheet, and the process is aimed at the production of the sheet. The material also needs to go through processes such as forming and punching to obtain the carrier tape; the Chinese patent No. CN101982310 disclosed a rapid prototyping process for plastic carrier tape on March 2, 2011, which includes the following steps: first, two kinds of plastic particles After drying, put the dried two kinds of plastic particles into the extruder to extrude into a plate, one of which forms the middle layer of the plate, and the other forms the upper and lower surface layers of the plate. When the plate is not cooled, it is made into a carrier tape by vacuum forming, and finally it is punched, cut and rolled.

However, this process also has shortcomings: if the plastic components of each layer are not different, the expected effect of multiple layers cannot be achieved; if the plastic components of each layer are different, different plastic components will have different process requirements